(19)

(11)

EP 1 216 323 A1

(12)

(43) Date of publication: 26.06.2002 Bulletin 2002/26 (21) Application number: 00926266.8 (22) Date of filing: 20.04.2000

(51) International Patent Classification (IPC)7: D21C 9/00, D04H 1/64, D21H 11/16 (86) International application number: PCT/US0010/854 (87) International publication number: WO 0065/146 (02.11.2000 Gazette 2000/44)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 26.04.1999 US 299712 (71) Applicant: WEYERHAEUSER COMPANY TACOMA, WA 98477-2999 (US)	(72) Inventors: WESTLAND, John, A. Auburn, WA 98001 (US) ELSTON, Colin Gig Harbor, WA 98335 (US) (74) Representative: Trueman, Lucy Petra  Barker Brettell,138 Hagley Road,Edgbaston Birmingham B16 9PW Birmingham B16 9PW (GB)